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#1 CM Punk
Yes this one is a long-shot, however if it can be pulled off then the WWE would reap the rewards. CM Punk has been absent from the WWE since his infamous exit in 2014. He has since pursued a career in the UFC, however at the age of 40 and having lost both his fights, this career path now looks over.
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The Chicago born wrestler was heavily rumoured to appear at 'ALL In' but this never came to fruition. With the likes of Brock Lesnar and John Cena being paid heavily for an appearance in Saudi Arabia it will likely take a lot for Punk to return.
This perhaps makes a return for Punk at the PPV possible. Punk reportedly doesn't want to be involved in WWE's heavy schedule again, so a one off appearance that he is paid handsomely for would likely suit the straight edge star.
